Turnover of Dissolved DMSP in Estuarine and Shelf Waters of the Northern Gulf of Mexico

Kiene, Ronald P.

doi:10.1007/978-1-4613-0377-0_29

Cited by 30 publications

(49 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Each 50-ml subsample was filtered through a 47-mm Whatman GF/F filter (0.7 m nominal retention) by using gravity only. DMSP on the filter (DMSPp) or in the filtrate (DMSPd) was quantified by gas chromatography after its conversion to DMS by alkaline hydrolysis (Kiene 1996b). Dissolved DMS and MeSH concentrations were determined in duplicate on 2 or 4 ml subsamples as described in Kiene (1996b).…”

Section: Dmsp and Dms Concentration Measurements-watermentioning

confidence: 99%

“…Concentrations of DMSPp typically range from 5 to Ͼ300 nM depending on factors such as phytoplankton biomass and species composition (Iverson et al 1989;Malin et al 1993). The dissolved DMSP pool is generally smaller (1-50 nM) than the particulate pool, but is believed to be more dynamic, with turnover times estimated to be on the order of hours in subtropical waters (Kiene 1996b;Ledyard and Dacey 1996). 1 Corresponding author (rkiene@jaguar1.usouthal.edu).…”

mentioning

confidence: 99%

“…DMSP also represents a significant fraction (1-16%) of the cellular organic carbon in certain phytoplankton cultures (Matrai and Keller 1994) and in field populations (Bates et al 1994). Once released from phytoplankton, either by direct excretion, grazing, or viral lysis, DMSPd is rapidly degraded (Kiene 1996b;Ledyard and Dacey 1996) and probably utilized as a growth substrate by bacteria (Ledyard and Dacey 1994;Yoch et al 1997;González et al 1999). Marine bacteria degrade DMSP either to DMS or to other sulfur compounds including the highly reactive species, methanethiol (MeSH) (Kiene 1996a).…”

mentioning

confidence: 99%

“…Once released from phytoplankton, either by direct excretion, grazing, or viral lysis, DMSPd is rapidly degraded (Kiene 1996b;Ledyard and Dacey 1996) and probably utilized as a growth substrate by bacteria (Ledyard and Dacey 1994;Yoch et al 1997;González et al 1999). Marine bacteria degrade DMSP either to DMS or to other sulfur compounds including the highly reactive species, methanethiol (MeSH) (Kiene 1996a). Recently another ecologically-important function of DMSP was discovered; it serves as a major source of sulfur for bacterial protein synthesis .…”

mentioning

confidence: 99%

“…To date most studies of DMSP cycling have relied upon experiments in which DMSPd has been added to seawater at concentrations significantly above those present naturally (Kiene 1996b;Ledyard and Dacey 1996). This approach, although useful for providing potential DMSPd turnover rates and information about the sulfur gases produced, suffers from the problems associated with artificially increasing substrate levels above ambient levels, and with the long incubation times (usually many hours) required to observe changes in DMSP/DMS pool sizes by the gas chromatography methods typically employed.…”

mentioning

confidence: 99%

See 4 more Smart Citations

Distribution and turnover of dissolved DMSP and its relationship with bacterial production and dimethylsulfide in the Gulf of Mexico

Kiene

Linn

2000

Limnology & Oceanography

Self Cite

197

163

View full text Add to dashboard Cite

We measured the distribution of particulate and dissolved pools of the phytoplankton osmolyte dimethylsulfoniopropionate (DMSP) in the euphotic zone at a series of shelf (Ͻ40 m total water depth) and oceanic (Ͼ500 m depth) stations in the northern Gulf of Mexico. We also measured turnover rates of the dissolved DMSP pools (DMSPd) with tracer additions of 35 S-DMSPd and short-term (Ͻ1 h) incubations, with the aim of examining the relationship between DMSPd turnover and bacterial production. Particulate DMSP concentrations were relatively low (Ͻ25 nM) throughout the study area with about twofold higher mean concentration at the shelf sites (15 nM) compared with the oligotrophic oceanic sites (7 nM). DMSPd concentrations averaged 3.0 nM in shelf waters and 1.3 nM in oceanic waters. Concentrations of dimethylsulfide (DMS), a degradation product of DMSP, also were low throughout the Gulf, averaging 2.0 nM for all depths sampled and 2.5 nM in surface waters. Microbial assemblages metabolized 35 S-DMSPd with the sulfur being incorporated into biomass, volatile compounds (DMS and methanethiol), and other dissolved products. DMSPd turnover was relatively slow (mean of 3.8 nM d Ϫ1) in oligotrophic oceanic waters and averaged 10-fold higher (39 nM d Ϫ1) in mesotrophic shelf waters. DMS concentrations ranged from 0.2 to 5.1 nM in oceanic waters and appeared to be weakly related to DMSP turnover. In contrast, DMS concentrations in shelf waters fell within a narrow range (0.8-2.8 nM) and showed no relationship at all with DMSPd turnover. DMSPd turnover rates were high enough to sustain the measured concentrations and estimated turnover of DMS, even if the conversion efficiency of DMSPd into DMS was only 10%. DMSPd turnover was significantly correlated with bacterial production (as measured by 3 H-thymidine incorporation) and we estimate that DMSPd turnover contributed a mean of 3.4% of the carbon and ϳ100% of the sulfur required for bacterial growth in Gulf of Mexico surface waters. In addition to its role as a precursor of DMS, DMSP deserves attention as an important substrate for bacterioplankton in the euphotic zone.Dimethylsulfoniopropionate ((CH 3 ) 2 S ϩ CH 2 CH 2 COO Ϫ ; DMSP) is a sulfur-containing compound that is produced by a wide variety of marine phytoplankton and is distributed throughout the euphotic zone of the oceans (Keller et al. 1989;Kettle et al. 1999). DMSP is present in operationallydefined particulate (DMSPp) and dissolved (DMSPd) forms with the DMSPp pool consisting of filterable phytoplankton and organisms that have accumulated DMSP from their diet. Concentrations of DMSPp typically range from 5 to Ͼ300 nM depending on factors such as phytoplankton biomass and species composition (Iverson et al. 1989;Malin et al. 1993). The dissolved DMSP pool is generally smaller (1-50 nM) than the particulate pool, but is believed to be more dynamic, with turnover times estimated to be on the order of hours in subtropical waters (Kiene 1996b;Ledyard and Dacey 1996). 1 Corresponding author (rkiene@jaguar1.u...

show abstract

Section: Dmsp and Dms Concentration Measurements-watermentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

See 3 more Smart Citations

Distribution and turnover of dissolved DMSP and its relationship with bacterial production and dimethylsulfide in the Gulf of Mexico

Kiene

Linn

2000

Limnology & Oceanography

Self Cite

197

163

View full text Add to dashboard Cite

show abstract

Biogeochemistry of Dimethylsulfide, Dimethylsulfoniopropionate, and Acrylic Acid in the Changjiang Estuary and the East China Sea

Liu

et al. 2017

JGR Oceans

View full text Add to dashboard Cite

The distributions of dimethylsulfide (DMS), dimethylsulfoniopropionate (DMSP), and acrylic acid (AA) were investigated in the Changjiang Estuary during winter (dry season) and summer (wet season) 2014 and in the East China Sea (ECS) during summer 2015. The rates of dissolved DMSP (DMSPd) degradation with DMS and AA production, DMS degradation, and AA degradation in the ECS were also studied. Significant seasonal variations in DMS(P) and AA concentrations were observed in the Changjiang Estuary with higher values during the wet season than during the dry season. The maximum ratio of AA/chlorophyll a (Chl a) occurred at the mouth of the Changjiang Estuary due to the combined effects of production from DMSP and terrestrial inputs from the Changjiang Estuary. The distributions of DMS(P) and AA in the ECS were dramatically influenced by the Kuroshio Current and the upwelling caused by the Taiwan Warm Current. The ratios of DMS(P)/Chl a and AA/Chl a exhibited similar patterns in the surface seawater of the ECS, which indicated that phytoplankton species and biomass might play important roles in controlling the distributions of DMS(P) and AA. In vertical profiles, high values of AA emerged in the upper water column and bottom seawater of the Changjiang Estuary. Meanwhile, the maxima of DMS(P) and AA generally appeared in the surface or euphotic layer, whereas their minima arose in the bottom seawater of the ECS. The degradation rates of DMSPd, DMS, and AA in the inshore waters were higher than those in the open sea.

show abstract

Role of Sulfur for Algae: Acquisition, Metabolism, Ecology and Evolution

Giordano

Norici

Ratti

et al. 2008

Advances in Photosynthesis and Respiration

View full text Add to dashboard Cite

Turnover of Dissolved DMSP in Estuarine and Shelf Waters of the Northern Gulf of Mexico

Cited by 30 publications

References 35 publications

Distribution and turnover of dissolved DMSP and its relationship with bacterial production and dimethylsulfide in the Gulf of Mexico

Distribution and turnover of dissolved DMSP and its relationship with bacterial production and dimethylsulfide in the Gulf of Mexico

Biogeochemistry of Dimethylsulfide, Dimethylsulfoniopropionate, and Acrylic Acid in the Changjiang Estuary and the East China Sea

Role of Sulfur for Algae: Acquisition, Metabolism, Ecology and Evolution

Contact Info

Product

Resources

About